Low-EMI High-Performance 4-Channel LED Driver for Automotive Lighting - LP8861-Q1

LP8861-Q1 (ACTIVE)

Low-EMI High-Performance 4-Channel LED Driver for Automotive Lighting

 

Description

The LP8861-Q1 is an automotive high-efficiency, low-EMI, easy-to-use LED driver with integrated boost/SEPIC converter. It has four high-precision current sinks that can provide high dimming ratio brightness control with a PWM input signal.

The boost/SEPIC converter has adaptive output voltage control based on the LED current sink headroom voltages. This feature minimizes the power consumption by adjusting the voltage to lowest sufficient level in all conditions. The boost/SEPIC converter supports spread spectrum for switching frequency and an external synchronization with dedicated pin. A wide-range adjustable frequency allows the LP8861-Q1 to avoid disturbance for AM radio band.

The LP8861-Q1 has an option to drive an external p-FET to disconnect the input supply from the system in the event of a fault and reduce inrush current and standby power consumption. The device can reduce LED current based on temperature measured with external NTC sensor to protect LED from overheating and extend LED lifetime.

The input voltage range for the LP8861-Q1 is from 4.5 V to 40 V to support automotive stop/start and load dump condition. The LP8861-Q1 integrates extensive fault detection and protection features.

Features

  • Qualified for Automotive Applications
  • AECQ100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
  • Input Voltage Operating Range 4.5 V to 40 V
  • Four High-Precision Current Sinks
    • Current Matching 1% (Typical)
    • LED String Current up to 100 mA/Channel
    • Dimming Ratio of 10 000:1 at 100 Hz
  • Integrated Boost/SEPIC Converter for LED String Power
    • Output Voltage up to 45 V
    • Switching Frequency 300 kHz to 2.2 MHz
    • Switching Synchronization Input
    • Spread Spectrum for Lower EMI
  • Power-Line FET Control for Inrush Current Protection and Standby Energy Saving
  • Extensive Fault Detection and Tolerance Features
    • Fault Output
    • Input Voltage OVP, UVLO, and OCP
    • Open and Shorted LED Fault Detection
    • Automatic LED Current Reduction With External Temperature Sensor
    • Thermal Shutdown
  • Minimum Number of External Components

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Parametrics Compare all products in Automotive LED Driver

 
Topology
Channels (#)
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Iout (Max) (A)
Iq (Typ) (mA)
LED Current Per Channel (mA)
Switching Frequency (Max) (kHz)
Operating Temperature Range (C)
Features
Applications
Package Group
Package Size: mm2:W x L (PKG)
Rating
LP8861-Q1 LP8860-Q1 LP8863-Q1 TPS61165 TPS61165-Q1 TPS61193-Q1 TPS61194-Q1 TPS61196-Q1 TPS61199
Boost
Sepic   
Boost Controller    Boost Controller
Sepic Controller   
Boost    Boost    Boost
Sepic   
Boost
Sepic   
Boost    Boost   
4    4    6    1    1    3    4    6    8   
4.5    3    3    3    3    4.5    4.5    8    8   
40    48    48    18    18    40    40    30    30   
7    2    7    3    3    6    6    120    8   
40    48    48    38    38    45    40    120    60   
0.4    0.6    0.9    1    0.4    0.1    0.4    0.2    0.56   
5    2.5    10    1.5    1.5    5    5    2    1.5   
100    150    150    400    100    100    100    200    70   
2200    2200    2200    1200    1200    2200    2200    800    800   
-40 to 125    -40 to 125    -40 to 125    -40 to 85    -40 to 105    -40 to 125    -40 to 125    -40 to 125    -40 to 85   
Adjustable Switch Frequency
Boost Sync
Fault Detection
Power-Line FET
Sepic Sync
Spread Spectrum
Temperature Compensation   
Adjustable Switch Frequency
Boost Sync
Fault Diagnostic
Hybrid Dimming/Phase Shift
I2C Control
Spread Spectrum   
Adjustable Switch Frequency
Boost Sync
Enable/Shutdown
Fault Diagnostic
Hybrid Dimming/Phase Shift
I2C Control
Power-Line FET
Precision Dimming Control
Soft Start
Spread Spectrum   
EasyScale 1-Wire Interface
Load Disconnect During Shutdown   
Load Disconnect During Shutdown
Synchronous Rectification   
Boost Sync
Spread Spectrum   
Boost Sync
Spread Spectrum   
Adjustable Switch Frequency    Adjustable Switch Frequency
Enable/Shutdown
OVP
PWM Control
Thermal Shutdown   
Backlight
Dome
Foot Well   
Backlight
Dome
Foot Well   
Backlight      Backlight    Backlight    Backlight    Backlight     
HTSSOP    HLQFP    HTSSOP    SOT-23
WSON   
SOT-23    HTSSOP    HTSSOP    HTSSOP    HTSSOP
SO   
20HTSSOP: 42 mm2: 6.4 x 6.5(HTSSOP)    32HLQFP: 81 mm2: 9 x 9(HLQFP)    38HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP)    6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)
See datasheet (WSON)   
6SOT-23: 8 mm2: 2.8 x 2.9(SOT-23)    20HTSSOP: 42 mm2: 6.4 x 6.5(HTSSOP)    20HTSSOP: 42 mm2: 6.4 x 6.5(HTSSOP)    28HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP)    20HTSSOP: 42 mm2: 6.4 x 6.5(HTSSOP)
20SO: 98 mm2: 7.8 x 12.6(SO)   
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